Method sock_sendto

Lib/asyncio/selector_events.py:583–608

Send data to the socket. The socket must be connected to a remote socket. This method continues to send data from data until either all data has been sent or an error occurs. None is returned on success. On error, an exception is raised, and there is no way to determ

(self, sock, data, address)

            pos[0] = start

    async def sock_sendto(self, sock, data, address):
        """Send data to the socket.

        The socket must be connected to a remote socket. This method continues
        to send data from data until either all data has been sent or an
        error occurs. None is returned on success. On error, an exception is
        raised, and there is no way to determine how much data, if any, was
        successfully processed by the receiving end of the connection.
        """
        base_events._check_ssl_socket(sock)
        if self._debug and sock.gettimeout() != 0:
            raise ValueError("the socket must be non-blocking")
        try:
            return sock.sendto(data, address)
        except (BlockingIOError, InterruptedError):
            pass

        fut = self.create_future()
        fd = sock.fileno()
        self._ensure_fd_no_transport(fd)
        # use a trick with a list in closure to store a mutable state
        handle = self._add_writer(fd, self._sock_sendto, fut, sock, data,
                                  address)
        fut.add_done_callback(
            functools.partial(self._sock_write_done, fd, handle=handle))
        return await fut

    def _sock_sendto(self, fut, sock, data, address):
        if fut.done():